Answer:
95
Step-by-step explanation:
If the mean is 400 and the standard deviation 12.5. It means that a range between 375 and 425 is the mean +- 2 standard deviations
400 - 12.5*2 = 375
400 + 12.5*2 = 425
Which means the probability is 95%
When you are looking for +- 1 deviation standard the probability is 68, and for +- 3 the probability is 99.7
There is a more complex explanation based on Z, but assuming you are only applying 68-95-99.7 rule this should be enough.
<1 = 72
<2 = 156
<3 = 24
<4 = 112
<5 = 44
<6 = 136
Answer:
x = 3
y = -4
Step-by-step explanation:
see attached
the solution to the system of equations correspond to the coordinates of the point of intersection of the 2 graphs.
turns out that the graphs intersect at (3,-4)
hence the solution is x = 3 and y = -4
All real numbers because it’s a function that has no limit
